MuMetal®Magnetic Shield Corporation
Purpose: MuMetal offers electromagnetic field shielding which includes very high magnetic permeability, the ability to absorb magnetic energy. This metal is used for reducing low-frequency electromagnetic interference (EMI).
Specifications: ASTM A-753, Alloy 4; MIL N-14411C Composition 1
Characteristics: An alloy with exceptionally high magnetic permeability, very low coercive force, very low core losses and low remanence by magnetic field annealing.
Typical Properties (Annealed):
0.2% Yield Strength 49 ksi (338 MPa)
Density 0.316 lb/in3 (8.25 g/cm3)
Tensile Strength 99 ksi (682 MPa)
Electrical Resistivity 47 microhm cm
Elongation 32% in 2” (51 mm)
Grain Size ASTM 7 or finer (Mill annealed)
Hardness 15T 85
DC μ at 40 gauss 80,000
DC μ at 100 gauss 105.000
DC μ maximum 350,000
DC Hc 0.005 Oe
DC Br (gauss) 4,000
AC 60Hz μ at 40 gauss 65,000
(0.014” (0.36 mm) test sample thickness after annealing)
C 0.015 wt% Ni 80.20 wt%
Mn 0.50 wt% Mo 4.85 wt%
P 0.005 wt% max Al 0.01 wt% max
S 0.001 wt% max Co 0.02 wt% max
Si 0.30 wt% Fe Balance
Cr 0.02 wt% max
MuMetal is a registered trademark of Magnetic Shield Corporation
70 East Jefryn Boulevard
Deer Park, NY 11729
Phone: 631 586-4309
New larger location
As of August 2014, we have moved to this new, larger, modern facility to better service your needs.
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